Based purely on my shooting experience only, I voted one bow. But I do agree that accuracy is the shooter, not the bow. Bow certainly helps, but it won't work without someone to pull the string.
I've got only two bows, both Blackwidow longbows, identical other than draw weight and woods, and I can swap back and forth between them no problems.
Pick up either of my son's longbows or my mates recurve and I can hardly hit squat.
If I persevere with a different bow long enough, my brain eventually seems to work it out, and I end up shooting it better. But it takes quite a while though.
My hat's off to those of you who can pick up any bow and straight up shoot it well. That's a skill.
Best
Lex